Annie Desrochers

Annie Desrochers
Université du Québec en Abitibi-Témiscamingue · Forest Research Institute (IRF)

PhD Forest Biology and Managem

About

113
Publications
34,739
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,109
Citations
Additional affiliations
March 2002 - December 2012

Publications

Publications (113)
Article
Full-text available
We investigated the frequency of root grafting in naturally and artificially regenerated stands of jack pine (Pinus banksiana Lamb.) in the western boreal forest of Quebec, Canada. Twelve 30-60 m2 plots were hydraulically excavated to determine effects of site characteristics on frequency and timing of root grafting. Naturally regenerated stands ha...
Article
Full-text available
In species such as aspen (Populus tremuloides Michx.), trees are interconnected through their root system owing to their regeneration mode by root suckering. These root connections challenge classic notions of forest dynamics that con-sider trees as individuals competing for resources, because root connections allow trees to share water, minerals,...
Article
Natural root grafts (anastomoses) are morphological unions formed between roots of different trees. Common root systems allow translocation of water, nutrients and photosynthesis products between grafted trees, affecting their growth and their physiology. As carbohydrates are redistributed among grafted trees, the formation of a common root system...
Poster
Full-text available
Eskers are fluvioglacial geological formations providing many natural resources important for the economy and the population. These ecosystems, and the associated fungi, seem unique in the world and have never been investigated to date. They also remain vulnerable as they are highly sought over for wood, sand, and gravel. Our study aims to characte...
Poster
Full-text available
Eskers are fluvioglacial geological formations providing natural resources important for the economy and the population. The associated fungal communities have barely been investigated to date. These ecosystems are vulnerable as they are highly sought over for water, wood, sand and gravel. As a result, fungal communities of esker forests might be t...
Poster
Full-text available
La séquestration du carbone (C) dans le sol fait partie des solutions pour atténuer les changements climatiques. Les arbres à croissance rapide constituent un outil potentiel dans ce contexte puisqu’ils accumulent rapidement du C dans leur biomasse et pourraient transférer davantage de matière organique dans le sol. Toutefois, l’impact de la produc...
Presentation
Full-text available
Les eskers sont des formations géologiques fluvioglaciaires fournissant des ressources naturelles importantes pour l'économie et la population. Caractérisés par des peuplements de Pinus banksiana Lamb., les podzols d’eskers représentent des environnements stressants car présentant des faibles teneurs en nutriments, un pH acide et des conditions xér...
Article
Full-text available
Published in the "Couvert Boréal". https://couvertboreal.com/publications/printemps-2022/
Presentation
Full-text available
Popularizing research works and science is a crucial part of scientific activities. As a researcher, we need to communicate and make accessible our research to non-specialized interlocutors. It is within this perspective that I participated in a science communication event called "My thesis in 180 secondes", created by ACFAS and hosted at the Unive...
Presentation
Full-text available
Within the first edition of the DRYADES Conference Series hosted online, I presented the beginning of my M.Sc thesis project at the recently created Ecology Research Group of MRC Abitibi. As the main audience was composed of university students, it was also the opportunity to have a few words about perseverance, audacity and passion during academic...
Presentation
Full-text available
Eskers are fluvio-glacial geological formations resulting from the deposition of sediment in subglacial or ice-walled channels during the retreat of glaciers 10,000 years ago. They provide a large quantity of natural resources crucial for the economy and the population, including, among others, high quality drinking water, forests of Jack pine Pinu...
Presentation
Full-text available
Changing one's living environment and knowing how to take risks, as well as important decisions, is the very essence of scientific research. This presentation attempts to explain simply how I started out in a t-shirt drinking wine, to being dressed as I'm going for a polar expedition. All this through a retrospection of the year 2021, as well as a...
Chapter
Full-text available
Monitoring of forest response to gradual environmental changes or abrupt disturbances provides insights into how forested ecosystems operate and allows for quantification of forest health. In this chapter, we provide an overview of Smartforests Canada, a national-scale research network consisting of regional investigators who support a wealth of ex...
Poster
Full-text available
Voici mon affiche présentée lors du Colloque du CAFD montrant un résumé de mon projet de recherche ainsi que des résultats préliminaires concernant l'étape de la germination de ma méthodologie.
Poster
Full-text available
Les Eskers sont des formations géologiques fluvio-glaciaires résultant du dépôt de sédiments dans des canaux sous-glaciaires ou à parois de glace pendant le retrait des glaciers il y a 10 000 ans. Ils fournissent une grande quantité de ressources naturelles cruciaux pour l’économie et la population, incluant entre autres une eau potable de grande q...
Poster
Full-text available
This poster shows some details about my master’s project, which focuses on the relationship between germination and establishment of boreal trees in the context of climate change.
Poster
Full-text available
Réponse des clones de peuplier hybride au recépage plantés en taillis à courte rotation  À cause des forêts naturelles qui fournissent la grande majorité des produits du bois, la culture en TCR au Canada n'est pas trop avancée.  Une plantation en taillis à courte rotation (TCR) établie en 2010 à Val Senneville, recépée une fois en 2012 et une deu...
Poster
Full-text available
Article
Natural root grafts (anastomoses) result from the fusion of the vascular systems of two roots and allow trees to share water, nutrients and photosynthesis products, affecting tree growth and physiology. The aim of this study was to investigate the frequency of root grafting in balsam fir (Abies balsamea (L.) Mill) of the boreal forest of Quebec (Ca...
Article
Full-text available
Key message Root grafting occurs in 15-year-old hybrid poplar clones; and tree proximity, tree and root sizes are key factors enhancing its frequency. Abstract Root grafting in trees is a well-recognized phenomenon allowing nutrient and photosynthate redistribution between connected trees. This study assessed the influence of tree spacing on root...
Article
Full-text available
Research highlights: To understand differences in the establishment of balsam fir regeneration observed in the boreal forest, we examined how soil layer and microorganisms explained differences in growth and mycorrhization in three different stand types. Our experiment revealed positive and negative effects on growth of seedlings, and highlights th...
Article
It is well known that soil physico-chemical conditions and the nature of organic matter have important effects on soil micro-arthropod communities, including collembolans. However, mechanisms by which the physical or chemical quality of litter influence collembolan communities remain unclear. Plant secondary metabolites are partially released in so...
Poster
Full-text available
Il y a un intérêt croissant pour les espèces à croissance rapide de peuplier hybride expliqué à la fois par le taux de croissance rapide et le potentiel élevé de rendement. Si la productivité des peupliers en futaie régulière est étudiée depuis des années, ce n’est pas le cas pour les systèmes de culture en taillis à courte rotation et leur product...
Article
Full-text available
Succession is generally well described above-ground in the boreal forest, and several studies have demonstrated the role of interspecific facilitation in tree species establishment. However, the role of mycorrhizal communities for tree establishment and interspecific facilitation, has been little explored. At the ecotone between the mixed boreal fo...
Article
Full-text available
Roots directly affect planted seedling adaptation to new growing conditions at reforestation sites. To test the influence of root characteristics on the short-term response of seedlings to limiting resources (water, nutrient, or oxygen), we conducted two experiments. We compared (1) the growth and physiology of three types of four-year-old black sp...
Article
Planting shock can last for several years during which seedling growth may significantly slow down. This duration depends upon the time that is required for the root system to acclimatize to its new environment. We hypothesized that characteristics of the root system are important factors for black spruce (Picea mariana [Mill.] BSP) seedling establ...
Article
Full-text available
The mechanistic bases of thermal acclimation of net photosynthetic rate (An) are still difficult to discern, and the data sets available are scarce, particularly for hybrid poplar. In the present study, we examined the contribution of a number of biochemical and biophysical traits on thermal acclimation of An for two hybrid poplar clones. We grew c...
Data
Analysis of variance, F and P values for thermal acclimation-related traits. (PDF)
Data
Western blot of RuBisCO and RuBisCO activase for two hybrid poplar clones (M×N and M×B) under combinations of growth temperature (23°C and 33°C) and nitrogen level (high level: HN and low level: LN). (PDF)
Data
P value and R2 of curves in Figs 1, 2 and 3. (PDF)
Article
Full-text available
Black spruce (Picea mariana (Mill.) BSP) is a boreal tree species characterized by the formation of an adventitious root system. Unlike initial roots from seed germination, adventitious roots gradually appear above the root collar, until they constitute most of mature black spruce root system. Little is known about the physiological role they play...
Article
Full-text available
Aims While fungi are key drivers of the carbon cycle and obligate symbionts of trees, the link between plant-fungal interactions and landscape vegetation changes has been largely overlooked. Our aim was to test whether a local difference in dominant tree species would shape the composition of soil fungi communities. Methods Fungal communities were...
Poster
Full-text available
Hybrid poplars are known for their natural fast growth and high production of woody biomass in a short period of time. Hybrid poplars are grown in a high forest (rotation length 20-25 years) and as well as in short rotation coppice (SRC; rotation length from 2-8 years). Poplar woods are used in building constructions, in the pulp and in paper indus...
Preprint
Full-text available
The mechanistic bases of thermal acclimation of net photosynthetic rate (An) are still difficult to discern and empirical research remains limited, particularly for hybrid poplar. In the present study, we examined the contribution of a number of biochemical and biophysical traits on thermal acclimation of An for two hybrid poplar clones. We grew cu...
Article
Full-text available
Machine learning, an important branch of artificial intelligence, is increasingly being applied in sciences such as forest ecology. Here, we review and discuss three commonly used methods of machine learning (ML) including decision-tree learning, artificial neural network, and support vector machine and their applications in four different aspects...
Article
Full-text available
Leaf photosynthetic characteristics could be determinant factors to identify the most productive clones of hybrid poplars (Populus spp.) and willows (Salix spp.). Photosynthetic acclimation of hybrid poplars and willows was studied under greenhouse conditions. Seven Populus and five Salix clones were grown for 3 months at three spacings [20 × 20, 3...
Article
We developed allometric equations for small-diameter woody species growing on mixed forest marginal lands, which are potential sources of biomass for bioenergy. Eleven species of trees and shrubs were sampled from a site located in eastern Canada. Equations derived in this study generally performed better than equations from the literature. Also, f...
Article
Full-text available
We studied three hybrid poplar plantations in Quebec (Canada) established on sites with varying soil and environmental characteristics to investigate the effects of logging residues on the water potential, carbon isotope ratio and foliar nutrients of planted trees. On each site, four treatments representing different residue loads, as well as treat...
Article
Full-text available
Key message Connected root systems reduced the negative impact of August temperatures and insect outbreak on growth. Abstract Root connections between trees can be an ecological advantage of clonal plant species in environments with unevenly distributed resources. We investigated the effects of root connectivity in stands of balsam poplar in Quebec...
Article
Full-text available
Balsam poplar seeds are short-lived and require moist seedbeds soon after they are released to germinate. In addition to sexual reproduction, balsam poplar stands can regenerate clonally by root suckering. The origin of stands will in turn affect their genetic structure and root system architecture, which are poorly understood for upland forest sta...
Article
Full-text available
A broad and diversified group of compounds, secondary metabolites, are known to govern species interactions in ecosystems. Recent studies have shown that secondary metabolites can also play a major role in ecosystem processes, such as plant succession or in the process of litter decomposition, by governing the interplay between plant matter and soi...
Article
Full-text available
Spruce budworm (Choristoneura fumiferana Clem.) outbreaks cause extensive mortality and growth reductions throughout boreal forests in eastern North America. As tree vulnerability to defoliation remains partially unexplained by tree and stand attributes, we hypothesized that root grafting might attenuate the negative impact of severe defoliation in...
Article
Full-text available
Boreal black spruce (Picea mariana) forests are prone to developing thick organic layers (paludification). Black spruce is adapted to this environment by the continuous development of adventitious roots, masking the root collar and making it difficult to age trees. Ring counts above the root collar underestimate age of trees, but the magnitude of a...
Article
Full-text available
Clonal integration between ramets can be an ecological advantage of clonal plant species in environments where resources are patchily distributed. We investigated physiological integration among Populus balsamifera L. ramets under drought stress in order to demonstrate water sharing between connected ramets. Pairs of connected ramets were grown in...
Article
Full-text available
Background and Aims Abandoned lands are increasingly used to establish fast-growing tree plantations, and are often rapidly colonized by a high density of herbaceous undergrowth. These weeds are generally removed since they compete with trees for resources, in particular soil nutrients. However, mixing herbaceous litter with the litter of planted t...
Article
Full-text available
Tree species influence the litter decomposition process by influencing litter quality and soil microclimate. Furthermore, over the long term, trees could promote soil communities that are particularly capable of degrading the litter they encounter most often. Thus, plant litter could decompose faster when placed in the habitat from which it was der...
Article
Full-text available
Tree planting is a useful means of integrating reclaimed mine sites into natural forested landscapes. The main objective of this study was to evaluate the effect of soil thickness and nature on the establishment and metal accumulation of trees planted in non acid-generating mine wastes under boreal conditions. Two field experiments were conducted t...
Article
Full-text available
Key message Pruning one third of crown length in summer produced the least number of epicormic branches after two growing seasons. Epicormic branches can be removed without compromising tree growth.•ContextThe formation of epicormic shoots is often observed following pruning treatments, but their role in the overall tree growth is unknown.•AimsThe...
Article
Full-text available
This study compared growth of hybrid poplar in relation to soil mounding and mechanical weed control on a former agricultural site under boreal climate in order to assess optimal management scenarios. Height and basal diameter growth of 2 clones (Populus maximowiczii × P. balsamifera [915319] and P. × euramericana × P. maximowiczii [916401]) were e...
Article
Full-text available
Natural root grafting has been observed in more than 150 tree species where up to 90 % of trees could be interconnected within a stand. Intraspecific root grafting was previously found in Pinus banksiana stands, ranging from 21 to 71 % of trees grafted with one another. It is not known why root grafting is frequent in some species and not in others...
Article
Full-text available
The capacity of trees to produce new roots is essential for rapid early growth of planted seedlings. Black and white spruce trees (Picea mariana and Picea glauca) are widely planted in the eastern boreal forest of Canada and are known to develop substantial adventitious root systems. In this study, we compared root development and growth of 17-year...
Article
Full-text available
Aspen clones were traditionally identified based on similarities in several phenotypic traits including leaf shape. This required several visits of the stands, laborious measurements and subjective visual assessments. In this study, we investigated a novel approach to clone identification using digital morphometrics of leaf shape complemented with...